Siemens Simatic M7-400 Manual do Utilizador descarregar pdf (Página 543)

100

101

Interface Submodules

13-47

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

13.7.8 Analog Output Function

Analog Output Function

The 12-bit digital value to be converted is loaded left-justified into the DAC data

registers of the relevant DAC channel. After the data has been written into the

You can see the assignment of the address to the output channels and the

meaning of the data bits in Table.

The data format of the analog output value is a 16-bit value in twos complement.

You can see the representation of the digital output value in Table 13-44.

Table 13-40 Meaning of the Data Bits in the Analog Output Function (IF 961-AIO)

Offset

Address

D15

Writing

Remark

0 0 0 0 DAC data

channel 0

0 0 0 0 DAC data

channel 1

Status After Switching On

Both output channels contain the value “0”.

1 2 ... 538 539 540 541 542 543 544 545 546 547 548 ... 637 638

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